I should mention...I tend to favor defense and loss mitigation, hence why I tend not to use low-HP or level 1 troops.
I do have Sacrifice for troop-making.
If I think I'm going to stick with Fire Spiders and Royal Snakes for my tanks, then it seems like I should bring reinforcements for them. They're both plentiful on Darion and work well with my frog wife and jade belt. The risk of course is that I spend lots of cash to bring over hundreds of these guys, then something happens in Freedom Isles that makes me want to switch troops-- it kind of locks me in.
I suppose I should mention that I have 2 griffon eggs and could theoretically build them up via Sacrifice in Darion then bring them over.
I could also try taking out the circus guards and get 8 horsemen (and sacrifice them up). I even have the shield that gives +3 Def, +5 extra Def to horsemen
I could leave the Archmages behind and replace them with Cannonneers when I get to Western Islands. More damage is nice, though I really like the magic shield and even the telekinesis I use a lot.
With my Pilgrim Boots, I can have Knights at a speed of 3 (as long as I'm not using Royal Thorns). There are only 5 available immediately, though I could sacrifice up my knights before heading to the Isles.
Lots of options! Part of what really makes this game fun.